﻿using System;

namespace _006.字符串加密
{
	internal class Program
	{
		/**
		 *  把a->d  向后加3个字符
		 */
		static void Main(string[] args)
		{
			string str = Console.ReadLine();
			char[] chars = str.ToCharArray();
			for (int i = 0; i < chars.Length; i++)
			{
				if ((chars[i] >= 'a' && chars[i]<= 'z') || (chars[i] >= 'A' && chars[i] <= 'Z')) 
				{
					chars[i] = (char) (chars[i] + 3);
					// 超出范围 从头开始
					if ((chars[i] > 'z' && chars[i] < 'z' + 4) || (chars[i] > 'Z' && chars[i] < 'Z' + 4))
					{
						chars[i] = (char)(chars[i] - 26);

					}
				}
			}
			foreach (char c in chars)
			{
				Console.Write(c);
			}
		}
	}
}